Pulley.



0. q. CAMPBELL.

PULLEY I 7 APPLICATION FILED PEB.17, 1908.

900,481. v Patented 0ct.6, 1908.

3" 7601966 v jda77gr CPrezrce QQmyaQ/Z cmnn'ucn o. CAMPBELL, or LOS ANG sues, crtwoiixii.

runner.

Specification of Letters Patent.

Application filed February 1?, recs; Serial so. 416,210;

To'all ivhom it my concern;

Be a known-that I, c nem 0; CAMP- BELL, a citizen ofthe United States, residing at Los Angeles, in the county of Los'Angeles.

and State of California, have. invented new and. useful Improvements in Pulleys," of

. which the followingis aspecification;

My invention has particular reference tov particular class of pulleys known-as that idler or thimble pulleys, and has for its object the roductlon of a pulle of a unique and nove design that maybe etachably' se cured toanoperators hand in such a manner as to not interfere with the use of the hand,

for other vpur oses," andwhich can be instantly .broug 1-). into an operative positionwhen desired.

My invention is especially designed-for the use of moving picture machine operators, in the winding and unwinding of moving pic ture films.

picture machine, the operator after the'exe posure of along film by the machine, must rapidly remove'the film from the machine before substituting another film, This opera tion must be accomplished'as quickly as :pos-' sible-as the minimum amount of time must elapse between exposures. The accomplishment" of this operation is a somewhat'tediou's and inconvenient one usually accompanied by many discomforts, as during the rewindingof the .film the operator usually guides it ever his-thumb and second finger which are brought end to end for this purpose. The rapid passage of; the film over the fingers causes a burning sensation thatis somewhat disa eeable, moreover the film being of light weig toften becomes tan ledand twisted' With my improved pu ey the above ;re cited annoyances and discomforts are greatly obviated, and therewinding of the ex osed film is accomplished in a rapidand'e cientmanner.

I accomplish the above ebj ect by means of the device described herein and illustrated in drilled-and threaded at 7 for the reception of a threaded thumb piece 8. mounted on spindle 5 is a sheave 9 cylindrical in form and of a width to permit the I passage thereover of a moving picture film 10, annular flanges 11 on its edges forming ;g i1ide s andcontrolling the movement of the film. Pulley sheave 9 is provided with a cy lindrical bore 13 and recess 14 for the accommodation of the spindle and thimble secured thereto.

rubber which will possess sufficient friction under contact of the moving film to cause the rapid revolution ,of the sheave and thus pre- Epnt scratching or other injury to the moving I. have illustrated the sheave in. this instance as being formed of wood as that matey rial is inexpensive, but it may be formed of Heretofore 1n the operatlon of a moving.

other materials such as celluloid, in which case the resilient material .15 may be dispensedwith.

.During the operation ofunwinding a film the pulley being mounted on the operators I finger any tangling or accidental disarrangement may be instantly corrected without the necessity of removing the pulley from the fin 'er or laying'it down for an instant.

- t will be observed from the foregoing that I have rovided a novel and efficient device that wi l greatly accelerate the rewinding of ,movin picture films.

.l lavmg described -my invention what I claim as new and desire to secure by Letters Patent-isz- 1. A device of the class desc1ibed,cbmprising; a spindle provided on one end thereof liotativel y Patented-Oct. 6,1908.

' I .The-face' of sheave 9 is provided with. a resilientv material 15 preferably thin sheetwith a thimble; and a sheave rotatively mounted on said spindle.

2, A device of the class described, comprising, a spindle provided with means for detachably securing it to a finger, and a sheave mounted on said spindle.

I 3. A device of the class described, comprising, v "a spindle provided on one end thereof with a finger attaching means, and a flanged sheave rotatively mounted onsaid spindle.

'4. A device of the class described, comprising, a spindle provided on one end thereof with finger attaching means, and a sheave having a resilient face rotatively mounted on said spindle. I

5. A device of the class described,- comthimble adapted on said spindle,

entcovering for the face of the sheave.

. 7 A device of the class described,'comprising, a sindie provided on one end thereof with ger securing means, a flan ed sheave mounted on said spindle, anda rub er covering for the face of said sheave.

v8. In a pulley construction, a spindle provided on one end thereof with a thimble, said for placement on the finger, and a recessed sheave mounted on said spindle.

9. In a pulley construction,- a spindle provided on one end thereof with a thimble, said thimble adapted for placement on the finger, a recessed resiliently faced sheave mounted and meansto maintain the operative relation of said sheave to said spindle.

10. In a pulley construction, a spindle having one 0i its ends enlarged and recessed, a sheave mounted on said spindle, said sheave provided with a longitudinal bore recessed at one end, said recessed end adapted to encompass the enlarged end of said spindle, and means secured to said spindle to prevent the displacement of said sheave.

11. In a pulley construction, a spindle having one of its ends enlarged and recessed, a resiliently faced sheave mounted on said spindle, said sheave provided with a longitudinal bore recessed at one end, said recessed end adapted to encompass the enlarged end of said spindle, and means secured to said spindle to prevent the displacement of said sheave.

- In witness that I claim the foregoing I have hereunto subscribed my name this 10th day of February, 1908.

CLARENCE I o. CAMPBELL.

Witnesses:v

- EDMUND A. STRAUSE,

OLLIE PALMER. 

